Steam-engine.



5.1. ARMSTRONG.

STEAM ENGINE. APPLICATION FILED JAN.20I915 1,168,045. Patented Jim. 11,1916.

UNITED sTATEs PATENT oEEroE.

EDWIN J'. ARMSTRONG, OF ERIE, PENNSYLVANIA, ASSIGNOR TO BALL ENGINE COMPANY, OF ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

STEAM-ENGINE.

Specification of Letters Patent.

Patented Jan. 1,1, 1916.

Application filed January 20, 1915. Serial No. 3,370.

To aU fav/0m it may concern Be it known that I, EDWIN J. AEMsTRoNG, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania., have invented new and useful Improvements in Steam-Engines, of which the following isa specification.

This invention relates to steam engines and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims. l

More particularly the invention relates to the type of engine which isespecially useful in connection with steam power shovels. The moving parts of engines of this type are subjected to severe conditions because v of the dust necessarily present as an incident to the operation of the shovel. At the saine time the usual type of constructionof these' engines has made it difficult to inclose them.

The object of the present invention is to provide an inclosing means lcapable of use with engines of the ltype specified.

The invention i's illustrated in the accompanying drawings as follows Figure 1 shows a plan view of the engine, a part of the inclosing cover piece being broken away to better show construction. Fig. 2 shows a side elevation of the engine. Fig. 3 a section on the line 3-3 in Fig. l. Fig. 4 a section on the line 4-1 in Fig. 1.

1 marks the cylinder, 2 the steam chest, 3 the crank shaft, et the crank, it being understood that these are in pairs, the second crank being similar to the crank 4 but on a quarter relatively to said crank, and 5 the connecting rod. The connecting rod is journaled on the crank in the ordinary manner and pivotally connected with the cross head 6. The-cross heads are carried by the cross head guides 7 and 8 and these are carried by the frame 9. The eccentric rods 10 operate from the eccentric (dotted lines Fig. 1) and, convey movement to the rock levers 11. The rock levers are carried by a rock shaft 12. It will be understood that the second v cylinder has a duplication of the mechanism shown in the broken away part in Fig. 1. Valve rods 13 extend from the rock lever to the steam chest. It will be noted that these valve rods move in the same general direction as the crossheads but are oH-set from the cross heads in a direction at right angles to the pivotal connection between the cross head and the connecting rod 5, in other words, thevalve mechanisms with the engine placed as shown in the drawings are above the cross head guides 8. vThe eccentric rods l0 extend from the crank shaft to the levers lldconveying the movement to the .off-set ro s. and these are connected by the horizontal webs 15 in which the cross head guides are placed. The frame is open at the sides of the cross heads at 16 and inclosed by cover plates 17. Webs 18 extend upwardly from the webs 15 and the bearings 19 for the rock shafts 12 are arranged in these webs. The wall '14; is carried down on a slant from a position adjacent to the bearings, 19 so that the edge of the walls 14: are adjacent to the crank shaft bearings 20; A4 cover piece 21 co-acting with the frame completes the inclosure of the working parts, the joint 22 at the upper edge of the web 18 at 23 along the upper edge of the wall 111 being formed with the cover. By carrying the webs 18 up from the transverse webs 15 the part between the fixed part of the inclosing walls and the removable cover is such as to permit the bearings 19 to be in the fixed part of the inclosing walls.

lY/Vhere the engine is 4used as especially adapted for steam shovel work it is provided with a controlling valve, the stem 2-1 of which isbetwe'en the valve rods 13. It

'is connected'byvthe links 25 with the rock rlheengine frame has the sides I14` in the bearings 28. This bearing also 1s arranged in the web 18 so as tobe in the iixed part of the inclosing means. It will be readily observed that while all parts of this engine are readily accessible by this construction of frame and cover all parts may be entirely inclosed.

What I claim as new is 1. In a steam engine, the combination with the moving parts comprising a cross head; a crank; a connecting rod pivotally connected with the cross head and journaled on the crank; a valve rod moving in the same direction as the cross head and off-set from the cross head at right angles to the axis of the pivotal connection between the connecting rod and the cross head; and an eccentric rod driving the valve rod from the crank shaft; of cross head guides; cank shaft bearings; a frame on which the guides and bearings are carried; and devicesI coacting with the frame inclosing said work- 1ng parts.

2. In a steam engine, the combination with the moving parts comprising two cross heads; two cranks; connecting rodsv between the cross heads and the cranks, said connecting rods being pivotallyconnected with the cross heads and journaled on the cranks; engine valve rods moving in the same general direction as the cross heads and oE-set from the cross heads at right angles tothe axis of the pivotal connections between the cross heads and the connecting rods; eccentrics driving the valve rods from the crank shaft; a controlling valve rod between the engine valve rods; and means for actuating the controlling valve rod; of cross head guides; crank shaft bearings; a frame on which the guides and bearings are carried; and devices co-acting with the frame inclosing said working parts.

3. In a steam engine, the combination with the moving parts comprising a cross head; a crank; a connecting rod pivotally connected with the cross head and journaled on the crank; a valve rod moving in the same general direction as the cross head and off-set from the cross head at right angles to the axis of the pivotal connection between the cross head and the connecting rod; a rock arm from which the Valve rod is driven; a rock shaft on which the rock arm is mounted; and an eccentric rod for driving the rock shaft from the crank shaft; of

cross head guides; crank shaft bearings; bearings for said rock shaft; a frame on which the guides and bearings are mounted; and a cover piece co-acting with the frame inclosing said working parts, the joint between the cover piece and the frame forming the part of the inclosure immediately adjacent to the bearings in the frame.

4. In a steam engine, the combination with the moving parts comprising two cross heads; two cranks; connecting rods pivotal'ly connected with the cross heads and journaled on the cranks; engine valve rods incense the rock levers from the engine shaft; a controlling valve rod between the engine valve rods; a rock lever .to which the controlling valve rod is connected; a rock shaft on trolling valve rod is mounted; of cross head guides for said cross heads; crank shaft bearings; bearings for said rock shafts; a frame on which the guides and bearings are mounted, said frame having'inclosing webs extended to form the inclosing walls adjacent to said bearings; and a cover piece co-acting with said inclosing webs to inclose said working parts.

5. ln a steam engine, the combination with the moving parts comprising a cross head; a crank; a connecting rod pivotally connected with the cross head and journaled on-the crank; avalve rod moving in the same general direction as the cross head and off-set from the cross head at right angles to the axis of the pivotal connection between the cross head and the connecting rod; a rock arm from which the valve rod is driven; a rock shaft on which the rock arm is mounted; and an eccentric rod for drivwhich the rock lever controlling the' conning the rock shaft from the crank shaft of ln testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

EDWIN a. ARMs'rnoNe.

Witnesses V. C. Hass, B. M. HARTMAN. 

